function showDiv(divId){
	var canvas=document.getElementById("objectCanvas").childNodes;
	for (i=0; i<canvas.length; i++){
		if (canvas[i].nodeName=="DIV")
			if (canvas[i].id!=divId){
			canvas[i].style.display="none";
			}else{
			canvas[i].style.display="block";
			}
	}
}

  function init() {
    var latlng = new google.maps.LatLng(-34.397, 150.644);
    var myOptions = {
      zoom: 8,
      center: latlng,
      mapTypeId: google.maps.MapTypeId.ROADMAP
    };
    var map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
  }